64 lines
2.8 KiB
Markdown
64 lines
2.8 KiB
Markdown
KubeZero - Zero Down Time Kubernetes platform
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KubeZero is a pre-configured collection of components deployed onto a bare Kubernetes cluster.
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All chosen components are 100% organic OpenSource.
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# Design goals
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- Cloud provider agnostic, bare-metal / self-hosted possible
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- No vendor lock in
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- No closed source solutions
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- No premium services / subscriptions required
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- Staying to upstream projects as close as possible
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- Minimal custom code
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- Work within each community / give back
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## General
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- Container runtime cri-o rather than Docker for improved security and performance
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## Control plane
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- support for single node control plane for small clusters / test environments to reduce costs
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- access to control plane from within the VPC only by default ( VPN access required for Admin tasks )
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- controller nodes are used for various platform admin controllers / operators to reduce costs and noise on worker nodes
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- integrated ArgoCD Gitops controller
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## AWS IAM access control
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- Kiam allowing IAM roles per pod
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- IAM roles are assumed / requested and cached on controller nodes for improved security
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- blocking access to meta-data service on all nodes
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- IAM roles are maintained/ automated and tracked via CFN templates
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## Network
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- Calico using VxLAN incl. increased MTU
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- allows way more containers per worker
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- isolates container traffic from VPC by using VxLAN overlay
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- no restrictions on IP space / sizing from the underlying VPC architecture
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## Storage
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- flexible EBS support incl. zone awareness
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- EFS support via automated EFS provisioning for worker groups via CFN templates
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- local storage provider for latency sensitive high performance workloads
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## Ingress
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- AWS Network Loadbalancer and Istio Ingress controllers
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- No additional costs per exposed service
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- Automated SSL Certificate handling via cert-manager incl. renewal etc.
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- support for TCP services
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- Client source IP available to workloads via HTTP header
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- optional full service mesh
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## Metrics
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- Prometheus support for all components
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- automated service discovery allowing instant access to common workload metrics
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- Preconfigured community maintained Grafana dashboards for common services
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- Preconfigured community maintained Alerts
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## Logging
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- all container logs are enhanced with Kubernetes metadata to provide context for each message
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- flexible ElasticSearch setup via ECK operator to ease maintenance and reduce required admin knowledge, incl automated backups to S3
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- Kibana allowing easy search and dashboards for all logs, incl. pre configured index templates and index management to reduce costs
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- fluentd central log ingress service allowing additional parsing and queuing to improved reliability
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- lightweight fluent-bit agents on each node requiring minimal resources forwarding logs secure via SSL to fluentd
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